EMC VNX Series

System component description
EMC VNX8000 Hardware Information Guide 27
Figure 13 Example of 2U dual SPS B and A viewing from left to right (rear view)
SPS failure functionality
If AC power fails, the SPS provides backup power until the SP has flushed its write cache
data to the DAE disks. The SP then shuts off SPS power. If the cache flush has not
completed within 300 seconds—more than enough time to flush a full cache—or if the SP
has failed, then the SPS shuts down to prevent a deep discharge. If no AC input power is
available and the SPS is shut down, all the status LEDs will be off.
The output voltage, when the SPS is in the On-Line state, is a straight pass-through of the
AC voltage from inlet to outlets. When in the On-Battery state, the output voltage shall be
at an DC level within the specified limits (see the SPS battery LED in Table 11 on page 35).
When power returns, the SPS starts recharging the DC battery. It might reach a state of full
1 SPS B AC power in (recessed plug) 7 SPS A RJ-12 connector to the SP A
management (RJ-12) connector or to the
LCC B RJ-12 connector; for more
information, see “SPS RJ-12 connector” on
page 30
2 SPS B power out socket to the SP B
power supply on the SPE or to the LCC
B power supply on the Vault DAE
8 Four SPS A LEDs (for more information, see
“SPS LEDs” on page 29)
3 SPS B power out socket to the SP A
power supply on the SPE or to the LCC
A power supply on the Vault DAE
9 SPS A power on/off rocker switch
4 SPS A AC power in (recessed plug) 10 SPS B RJ-12 connector to the SP B
management (RJ-12) connector or to the
LCC A RJ-12 connector; for more
information, see “SPS RJ-12 connector” on
page 30
5 SPS A power out socket to the SP B
power supply on the SPE or to the LCC
B power supply on the Vault DAE
11 Four SPS B LEDs (for more information, see
“SPS LEDs” on page 29)
6 SPS A power out socket to the SP A
power supply on the SPE or to the LCC
A power supply on the Vault DAE
12 SPS B power on/off rocker switch
1 2 3 4 5 6
79 8
1012 11
VNX-000567